I hope you downloaded the freeware phenomenon "Streets of Rage Remake" when it was released last week. After nearly a decade of work, the fan game was pulled very shortly after it's release after the development team was contacted by SEGA. Despite not taking a single line of code from the source material, SEGA still owns the intellectual rights to the Streets of Rage series.
The dev team hasn't released any details on the matter, and moderators of the SORR forums have locked related topics. They have asked for copies which were previously downloaded not to be re-uploaded elsewhere.